Electric lamp



July 8,` 1941.

E. SCHWARZ ELECTRICLAMP Filed oct. '2. 1940 INVEKNTOR Kaye/1e Schwarz.

BY Wmf/w/ Patented July 8, 1941 UNlE T ELECTRIC LAMP Eugene Schwarz,Alexandria, Ind., assigner to The Mantle Lamp Company of America,Chicago, lll., a corporation of Illinois Application October 2, 1940,Serial No. 359,311

(Cl. 24o-8l) Claims.

diiiicult and Whenever replacements had to loe` made it was usuallynecessary to loosen the rigid structure of the lamp and to disconnectits wiring.

It is an object of the present invention to provide an electric lamphaving a main source of light and an auxiliary source of light whereinsaid auxiliary source of light is readily accessible without need todismantle the lamp.

More specifically it is an object of the present invention to furnish anelectric lamp having an auxiliary source of light disposed below themain source of light and housed in a receptacle formed by integral partsof the lamp structure and including a portion of a light transmissiblematerial wherein replacement of said auxiliary source of light and oisaid portion of a light transmissible material can readily be madewithout loosening the rigid connection of the elements constituting thelamp structure.

It is another object of the presentinvention to furnish a lamp headadapted to be mounted upon a lamp stand and having a main source oflight and an auxiliary source of light disposed within a receptacleformed by integral parts of the lamp head structure and including aportion of a light transmissible material, wherein the source of lightin the interior of said receptacle is readily accessible and the portionof light transmissible material may readily be replaced withoutinterfering with the rigid connections of the elements forming thestructure of said lamp head.

According to the invention a lamp of the type referred to includes areceptacle which houses the auxiliary source of light and whichcomprises a base portion upon which is mounted a shell of a lighttransmissible material. A dome having an outer diameter smaller than theinner diameter of ysaid shell is rigidly supported from said baseportion at approximately the level of the upper end oi said shell. Saiddome has a number of openings directly above said shell from whichprotrude removable pins or screws which keep said shell in properposition. The socket for the main source of light is mounted on top ofsaid dome and is preferably of a diameter smaller than the diameter ofsaid shell of light transmissible material. The base portion oi thereceptacle may be an integral part of the lamp stand or it may beprovided with screw threads at the bottom adapted to engagecorresponding screw threads in a lamp stand upon which the completedevice is to be mounted.

The invention will best be understood by reference to the accompanyingdrawing which illustrates a preferred embodiment thereof by way ofexample, and wherein Fig. 1 shows a lamp incorporating the presentinvention, and

Fig. 2 shows a detail of the lamp illustrated in Fig. 1 on an enlargedscale and partly in section,

The lamp shown in Fig. l has a pedestal I of cast iron, brass or anyother suitable material, upon which is mounted a tubular stem 2. At itsupper end stem 2 has a distended portion or bulge 3 including an annularwall or shell rl of translucent material and enclosing a small elec.tric bulb (Fig. 2). Upon portion 3 is mounted a reflector cup 5 whichhouses the socket for the main source of light represented by large bulb6. Reiiector cup 5 carries reflector 'I' which in turn supports lampshade 8.

Referring to Fig. 2 the distended portion or bulge 3 of the lamp standcomprises a base part 9 of cup shape terminating with an open tubularextension 9a at the bottom, The upper end of base part 9 is shaped toform an annular hori- Zontal area 9b upon which is supported annularshell 4 which is made of a translucent material such as frosted glass,porcelain or the like. vArea 9b is surrounded by an external rim orflange Ill formed on the edge of base portion 9 against which shell tmay bear and which determines the proper position of said shell. Threerigid supports II (only two visible in Fig. 2) rise Within the shell 4,from horizontal area 9b of base part e to which they may be attached byscrews I2. They support a dome I3 oi brass or the like with which theymay form an integral part, as shown and which is disposed atapproximately the same' level as the upper end of shell 4,

A lamp socket I4 holding auxiliary lamp I1 'is mounted within theinterior of base part 9 in any suitable manner, for instance by bracketl5 which is secured to the inside wall of base part `9 with the aid ofswitch I6 that controls'the operation of bulby Il. Auxiliary lamp I 'lvof low wattage is preferably disposed at approximately the same levelas translucent shell 4. A socket I8 for the main bulb 6 is mounted upondome I3 with the aid of screws I9 and reflector cup 5 is held inposition between the 4bottom of said socket 'and a flat annular area I3aformed at theupper end of dome I3. Reflector cup 5 is of such sizelaterally that it protrudes nowhere-'beyond the open width of shell li.A switch 20 is provided to 'control main bulb t. Any conventional wiringmay be employed in connection with switches IIS and 2i) that allowseither or both of the bulbs to be turned on at will.

The lower end oi dome I3 may terminate slightly below the upper end ofannular shell- 4. Dome I3 and shell 4 are so related in size that themaximum outside diameter of dome I3 is slightly smaller than thesmallest inside diameter of shell 4 and movable stops are provided forholding shell 4 in place, for instance. dome I 3 may have a number ofholes directly above said shell which are engaged by screws or pins 2|that extend over, and retain said shell in its proper position upon baseportion 9.

If it is desired -to have access to bulb Il within the receptacle formedby base portion 9, annular shell 4 and dome I3, it is only necessary toremove screws 2I and to liit shell 4. Due to the fact that the maximumexternal diameters `of dome I3 and reector cup 5 are smaller than thesmallest in'ternal diameter of translucent shell 4 it is possible tolift shell 4 past dome I3 whereupon the interior of the'receptacle isfreely accessible. Thus bulb IT may be exchanged without the needtodismantle parts of the lamp or loosen the rigid connection of themetallic elements that form the structure of the lamp. Likewise, if itis necessary to replace shell 4, for instance in case said shell hasbroken, a new shell may readily be slipped down over reiector cup 5 anddome I3 into its proper position onY base portion 9 after screws 2I andmain bulb 6 with reiiector 'I have been removed and there is no need toremove any main parts of the lamp assembly such as dome I3, reflectorcup 5 or socket I8 which would involve the disconnecting of the wiresthat supply power to the bulbs. To this end switch 20 may be located ata reduced portion 5a of reiector cup 5 and may protrude only 'to such anextent laterally that its free length together with the diameter of theieduced portion 5a of reflector cup 5 is shorter than the open width ofshell 4.

Other modications of the embodiment de scribed above within the scope of`the present invention will readily occur to those skilled in the art.

Bulge 3 may ferm an integral part of stem 2 oi the lamp by base portion9 being a direct continuation of tubular stem 2. Such a structure may beproduced by a process known as slush a separate detachable lamp head. Inthe latter instance screw threads may be provided in the tubularextension 9a of base portion 9 adapted to engage corresponding screwthreads provided in the top of stem 2. Additional subsidiary lamps maybe supported from part 3 such as arms or brackets 22 holding auxiliarylamps of the candle type and which may be rigidly attached to the sidesof base portion 9. In this case base portion 9 and brackets 22 may beproduced as a single integral piece by slush casting and also dome I3and supports II may be made as a single integral piece so that the lamphead comprises a minimum number of individual parts.

While I have shown my invention in the particular embodiment abovedescribed I do not limit myself thereto, and many equivalents may bedevised without departing from the scope of the appended claims.

Having thus described my invention what I claim is:

1. An electric lamp having a standard, said standard including anextended portion forming a base, a dome rigidly supported from and adistance above said base. a shell of light transmisi5 sible materialresting loosely upon said base and extending upward to said dome to formtogether with said basel and said dome a substantially closedreceptacle, an auxiliary lamp socket dis posed within said receptacle,and a main lamp socket mounted above said dome, the maximum outerdiameters of both said dome and said main lamp socket being smaller thanthe minimum inner diameter of said shell.

2. An electric lamp having a standard, said standard including anextended portion forming a base, a dome rigidly supported from and adistance above said base, a shell of light transmissible materialresting loosely upon said base and extending upward to said dome to formtogether with said base and said dome a substantially closed receptacle,an auxiliary lamp socket disposed within said receptacle, a main lampsocket mounted above said dome, the maximum outer diameters of bothsaiddome and said main lamp socket being smaller than the minimum innerdiameter of said shell, and a number of movable stops protruding fromsaid dome above the upper end of said shell.

3. An electric lamp having a standard, said standard including acupshaped portion forming a base, a dome rigidly supported from and adistance above said base, a shell of light transmissible materialresting loosely upon said base and extending upward to said dome to formtogether with said base portion and said dome a substantially closedreceptacle, an aum'liary lamp socket disposed within said receptacle, amain lamp socket mounted upon said dome and a reflector cup surroundingsaid main lamp socket and held in position between said dome and saidmain lamp socket, said reflector cup having a portion of reduceddiameter and a switch provided at said reduced portion, the maximumouter diameters of said reflector cup, said main lamp socket and saiddome being smaller than the minimum inner diameter of said shell.

ll. An electric lamp head adapted to be mounted upon a lamp standard,including a base portion, a dome rigidly supported from and a distanceabove said base portion, a shell oi light transmissible material restingloosely upon said base portion and extending upward to said dome to formtogether with said base portion and said dome a substantially closedreceptacle, an auxiliary lamp socket disposed within said receptacle,and a main lamp socket mounted upon said dome, the maximum outerdiameters of both said dome and said main lamp socket being smaller thanthe minimum inner diameter of said shell.

5. A lamp head adapted to be mounted upon a lamp standard including abase portion, a dome rigidly supported from and a distance above saidibase portion, a shell of light transmissible material resting looselyupon said base portion and extending upward to said dome to formtogether with said base portion and said dome a substantially closedreceptacle, an auxiliary lamp socket disposed within said receptacle, amain lamp socket mounted upon said dome, a reflector cup surroundingsaid main lamp socket and held in position between said dome and saidmain lamp socket, the maximum outer diameters of said reflector cup,said main lamp socket and said dome being smaller than the minimum innerdiameter of said shell, and a number of adjust allele stops protrudingfrom said dome above said s ell.

EUGENE SCHWARZ.

